Cisco Cisco IOS Software Releases 12.2 MC 發佈版本通知

The following sections list and describe the open and closed caveats for the Cisco MWR 1941-DC router 
running Cisco IOS Release 12.2(15)MC2b. Only severity 1 through 3 caveats are included.

Caveats describe unexpected behavior in Cisco IOS software releases. Severity 1 caveats are the most 
serious caveats, severity 2 caveats are less serious, and severity 3 caveats are the least serious of these 
three severity levels.

Caveats in Cisco IOS Releases 12.2 and 12.2 T are also in Cisco IOS Release 12.2(15)MC2b. For 
information on caveats in Cisco IOS Release 12.2, see Caveats for Cisco IOS Release 12.2. For 
information on caveats in Cisco IOS Release 12.2 T, see Caveats for Cisco IOS Release 12.2 T. These 
two documents list severity 1 and 2 caveats and are located on CCO and the Documentation DVD. 

If you have an account with Cisco.com, you can use Bug Navigator II to find caveats of any severity for 
any release. To reach Bug Navigator II, Login to Cisco.com and click Software Center: Cisco IOS 
Software: Cisco Bugtool Navigator II. Another option is to go directly to 
http://www.cisco.com/support/bugtools. 

There are no known open caveats in Cisco IOS Release 12.2(15)MC2b.

This section lists the caveats that are resolved in Release 12.2(15)MC2b.

CSCeb86268

Description: An adjacent T1 link keeps having CRC input errors if the peer router has its T1 link 
shut. The serial interface on the router in question would keep resetting.

This problem only occurs on the GT96K serial interface when the peer router has its adjacent T1 
link shut. This problem is observed in Cisco IOS 12.2T and 12.3.

Workaround: Shut down the T1 link on the router in question.

CSCec86420

Description: Cisco routers running Cisco IOS supporting Multi Protocol Label Switching (MPLS) 
are vulnerable to a Denial of Service (DoS) attacks on the MPLS disabled interfaces.

This vulnerability is only present in Cisco IOS release trains based on 12.1T, 12.2, 12.2T, 12.3 and 
12.3T. Releases based on 12.1 mainline, 12.1E and all releases prior to 12.1 are not vulnerable.

This bug is a complementary fix to CSCeb56909 which addresses this vulnerability.

More details can be found in the security advisory which is posted at:

http://www.cisco.com/warp/public/707/cisco-sa-20050126-les.shtml

CSCee75683

Description: When a standby router is reloaded, it takes over as the active router.

This occurs more often when the IP address of the standby router is higher than the active router. 
Pre-emption occurs on reload.